Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [patch] Rebase keyserver proxy support (3)

    Rebased on top of [1].

    [1] https://github.com/salt-formulas/salt-formula-linux/commit/9f30456

    Change-Id: Iad5aef674c47d622a94d1c21cae3f46fbb3c52d8
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 60cd82b..fd1f3fa 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 60cd82b0e2af9c8f34a97eacd4cee0893684e6ae
+Subproject commit fd1f3fa1c8c83b2e5f8cacc6a6caf1a14e40b1a5